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Distributed-generation-contained power distribution system fault recovery method based on mixed decision diagram

A distributed power supply and power distribution system technology, which is applied in the direction of electrical components, circuit devices, electrical digital data processing, etc., can solve the problems of island division model error and deviation from engineering reality, etc.

Active Publication Date: 2014-02-12
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the reactive power balance constraint is ignored, there will be serious model errors in the island division of fault recovery, which is out of the engineering reality

Method used

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  • Distributed-generation-contained power distribution system fault recovery method based on mixed decision diagram
  • Distributed-generation-contained power distribution system fault recovery method based on mixed decision diagram
  • Distributed-generation-contained power distribution system fault recovery method based on mixed decision diagram

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Embodiment

[0117] The distribution network diagram used in this embodiment is as follows figure 1 shown. The distribution network has a total of 33 nodes, with an active load of 3,715kW and a reactive load of 2,300kVar. Node 1 is a slack node. The calculation uses the standard unit system (the voltage reference value is 12.66kV, and the power reference value is 10MVA). In order to increase the scale of the system, there are switches on each branch, that is, the number of switches is equal to the number of branches. WTG is connected to nodes 7 and 17, and its active and reactive power are (120KW, 60KVar), (70KW, 30KVar), respectively. IDG is configured at node 31, and its apparent power is 300KMVA. The DG of node 17 does not have the black start capability, and the DG of nodes 7 and 31 have the black start capability. Each DG has the black start capability to disconnect the grid-connected circuit breaker. figure 1 In , the solid line represents the branch circuit equipped with isolatin...

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Abstract

The invention discloses a modeling method for achieving distributed-generation-contained power distribution system fault recovery. The modeling method comprises the following steps of (1) reading original data of a distribution network, using a switch as the boundary to carry out partition on the distribution network, and using the switch as a decision variable; (2) forming an adjacency matrix of a region to be recovered; (3) forming a reachable matrix of the region to be recovered; (4) forming the Boolean function about various fault recovery constraints; (5) carrying out merging to form a final mixed decision diagram, carrying out conversion to form an orderly binary decision diagram, and contracting a solution space; (6) determining an optimal fault recovery scheme for the contracted solution space according to a priority of an objective function. The modeling method for achieving distributed-generation-contained power distribution system fault recovery can effectively reduce the complexity for solving the distributed-generation-contained power distribution network fault recovery problem, and can have the advantages of being high in computation speed, high in credibility of solutions, good in actual operability of projects and the like.

Description

technical field [0001] The present invention relates to a fault recovery modeling method for a power distribution system with distributed power sources, in particular to a fault recovery method for a power distribution system with distributed power sources based on a hybrid decision graph, which is suitable for power distribution with a high degree of automation System failure recovery. Background technique [0002] With the rapid growth of power demand, the disadvantages of large-scale power grids characterized by large units, large power grids, and high voltages are becoming more and more obvious. Especially in recent years, there have been several large-scale blackouts around the world, led by blackouts in the United States and Canada, fully exposing the vulnerability of the power grid. [0003] As a new type of power generation and comprehensive utilization of energy with development potential, distributed power generation and energy supply technology has the advantages...

Claims

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Application Information

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IPC IPC(8): H02H3/06H02H7/26G06F19/00
Inventor 汪隆君王钢张竣淇李海锋钟庆
Owner SOUTH CHINA UNIV OF TECH
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